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Preparation method of nanomaterial-modified zeolite, and applications of zeolite in environment restoration

A technology for modifying zeolite and nanomaterials, which is applied in nanotechnology, chemical instruments and methods, and other chemical processes. Reduction and other issues, to achieve the effect of safe and reliable adsorption materials, easy industrial promotion, and low cost

Active Publication Date: 2016-12-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The above prior art has the following disadvantages: the use of pure zero-valent iron nanoparticles for environmental remediation is relatively costly; the reducing agent NaBH 4 The solubility in aqueous solution is low; the reaction process needs to be under the protection of nitrogen to prevent the oxidation of the product; the size of the product nanoparticles is not controlled; the pH of the reaction system is poorly controlled to produce Fe(OH) 3 Precipitation cannot be reduced; product preservation and easy agglomeration problems

Method used

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  • Preparation method of nanomaterial-modified zeolite, and applications of zeolite in environment restoration
  • Preparation method of nanomaterial-modified zeolite, and applications of zeolite in environment restoration
  • Preparation method of nanomaterial-modified zeolite, and applications of zeolite in environment restoration

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Embodiment 1

[0057] Embodiment 1, a kind of preparation method of nanomaterial modified zeolite, carries out following steps successively:

[0058] 1) 100 g of natural clinoptilolite was acid-washed with 1000 ml of 0.12M HCl, dried at 80° C. to constant weight, and passed through a 100-mesh sieve as a carrier.

[0059] 2) Weigh 100g of the carrier and add it to 2500ml of 0.24M FeCl 3 ·6H 2 O aqueous solution, adjust the pH of the gained suspension system to be 4.5 (using the HCl of 1M to adjust), ultrasonic (frequency is 53kHz, power is 500w) 30 minutes, then add the surfactant solution of 500ml and continue to stir (stirring speed is 2000r / min) 24 hours makes Fe 3+ Evenly adsorbed and wrapped on the inner and outer surfaces of natural clinoptilolite to obtain a mixed solution;

[0060] The above-mentioned surfactant solution is absolute ethanol.

[0061] That is, FeCl 3 ·6H 2 The volume ratio of O aqueous solution to surfactant solution is 5:1.

[0062] 3) Add 0.98M NaBH dropwise t...

Embodiment 2

[0069] Embodiment 2, a kind of preparation method of nanomaterial modified zeolite, carries out following steps successively:

[0070] 1) 100 g of natural clinoptilolite was acid-washed with 800 ml of 0.15M HCl, dried at 85° C. to constant weight, and passed through a 100-mesh sieve as a carrier.

[0071] 2) Weigh 100g of the carrier and add it to 1000ml of 0.28M FeCl 3 ·6H 2 In the O aqueous solution, adjust the pH of the suspension system to be 4.5, sonicate for 30 minutes, then add 100ml of surfactant solution and continue to stir for 28 hours to make Fe 3+ Evenly adsorbed and wrapped on the inner and outer surfaces of natural clinoptilolite to obtain a mixed solution;

[0072] The above-mentioned surfactant solution is an EDTA-2Na (disodium ethylenediaminetetraacetic acid) solution with a mass concentration of 5%.

[0073] That is, FeCl 3 ·6H 2 The volume ratio of O aqueous solution to surfactant solution is 10:1.

[0074] 3) Add 0.98M NaBH dropwise to the mixed solu...

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Abstract

The invention discloses preparation method of nanomaterial-modified zeolite. The preparation method of nanomaterial-modified zeolite comprises the following steps: 1) performing acid pickling, drying and sieving on natural clinoptilolite to be used as a carrier; 2) adding the carrier into 0.12-0.36 M FeC13.6H2O aqueous solution, adjusting the pH of the obtained suspension system to 3-5, performing ultrasonic treatment for 20-40 minutes, and then adding a surfactant solution for continuing to stir; 3) adding 0.9-1.02M NaBH4 aqueous solution o the mixed solution, and stirring for 22-26 hours at atmospheric pressure; and 4) filtering the suspension to obtain black solid, washing the black solid sequentially with 0.05-0.15M HCl, oxygen-free distilled water and anhydrous ethanol, and separating to obtain nanomaterial-modified zeolite. The nanomaterial-modified zeolite can be used for environment restoration, and has better adsorption effect on arsenic, cadmium and lead.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a preparation method of nano-material modified zeolite and its application in environmental restoration. Background technique [0002] In recent years, heavy metal pollution has become one of the serious problems threatening the global ecosystem. The removal of arsenic, cadmium, lead, etc. in wastewater mostly uses methods such as chemical precipitation, ion exchange, membrane separation, evaporation, and electrochemical treatment. These methods have the disadvantages of high energy consumption, low efficiency, and high cost to a certain extent. Therefore, the use of natural mineral composite materials to treat heavy metal-containing wastewater has gradually attracted attention. [0003] Natural zeolite is cheap and has large resource reserves. Its huge specific surface area and excellent ion exchange adsorption performance have broad application pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30B22F9/24B82Y40/00C02F1/28C02F101/20
CPCB01J20/0229B01J20/165B22F9/24B82Y40/00C02F1/281C02F1/288C02F2101/20
Inventor 刘杏梅李章涛孟俊王繁徐建明
Owner ZHEJIANG UNIV
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